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Finding the Fourth Proportional to 14,150.78, 21,226.20 and 4,916.78

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Solution

The fourth proportional to 14,150.78, 21,226.20 and 4,916.78 is: 7,375.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,150.78 : 21,226.20 = 4,916.78 : x
  2. Step 2: Convert to fraction form
    14,150.78/21,226.20 = 4,916.78/x
  3. Step 3: Cross multiply
    14,150.78x = 21,226.20 × 4,916.78
  4. Step 4: Simplify right side
    14,150.78x = 104,364,555.64
  5. Step 5: Solve for x
    x = 104,364,555.64/14,150.78
  6. Step 6: Final answer
    x = 7,375.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.